Malicious PDF — malware analysis report

Static analysis result for SHA-256 834d045852b31f96…

MALICIOUS

PDF

42.9 KB Created: 2020-08-11 19:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8620e2ebcb4611ab32f9cf793aac94af SHA-1: 8a62d05760c74b459cd14edea95fc0d2acde94e1 SHA-256: 834d045852b31f960aa52c44ccce4a7d0bf9ce2bdc67d6d02ce800e6a636036d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.ru. This suggests a link farm or SEO poisoning tactic to drive traffic to malicious infrastructure. The document body, though corrupted, contains the URL that triggered the malicious redirector heuristic, indicating the primary lure. No scripts were extracted from this sample.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=libro+de+los+annunakis+pdf
    • http://files.sherrymargerart.com/uploads/1/3/1/6/131606000/tumuwumodava.pdf
    • http://files.daisuke-teshima.com/uploads/1/3/1/1/131164250/88b991125.pdf
    • http://files.northernilangus.org/uploads/1/3/0/8/130814669/memupe_sidutisesaju_vonedokizekifi.pdf
    • http://lexozix.paleysmarket.com/uploads/1/3/2/8/132814930/lomefinilak.pdf
    • https://cdn.shopify.com/s/files/1/0438/9994/5112/files/56866558316.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0210/files/nazaruwurarifamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6170/files/suzif.pdf
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/42216448621.pdf
    • https://cdn.shopify.com/s/files/1/0434/5603/7016/files/68977667335.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/lifelel.pdf
    • https://cdn.shopify.com/s/files/1/0429/3722/1276/files/tivibutulu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7897/4616/files/obsession_frankie_j._lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/2413/7890/files/32809180339.pdf
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/bafg_antrag_nrw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b68.bin
93ab284331e795acf177eabba401a91d927e3fb7f6a9844f5e7e69f873f46567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B68 4980 bytes
font_01_sfnt_off00006c53.bin
e849c34cbd2809d6f4376b84c873608442fc132d9d95266daaf285a13884594d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C53 11188 bytes
font_02_sfnt_off000090f7.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90F7 4324 bytes

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